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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $709,060 | 340,410 | 54,899 |
| 2006 | $603,490 | 398,890 | 46,725 |
| 2007 | $644,049 | 454,689 | 44,927 |
| 2008 | $755,750 | 636,966 | 43,194 |
| 2009 | $637,569 | 342,341 | 0 |
| 2010 | $825,791 | 439,595 | 43,058 |
| 2011 | $1,324,337 | 585,129 | 66,413 |
Note: Quantity represents Number of pairs
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